"The Automatic Millionaire" by David Bach is a personal finance book that provides readers with a simple and effective plan to achieve financial success and security. The book emphasizes the importance of automating your finances and making smart financial decisions to build wealth over time. Bach introduces the concept of "paying yourself first" and explains how to set up automatic savings and investment plans to ensure a secure financial future. The book also covers topics such as homeownership, retirement planning, and debt management. Overall, "The Automatic Millionaire" offers practical advice and strategies for individuals looking to improve their financial situation and achieve long-term wealth.